Level.



L SAHA.

LEVEL.

APPLICATION FILED IAN-26.1917.

Patented Dec. 17, 1918.

2 SHEETS-SHEET I.

L. SAHA.

LEVEL.

APPLICATION FILED mus. 1911.

1,288,212. Patented Dec. 17, 1918.

2 SHEETSSHEET 2.

INVENTQQ.

armulua. \nlsulucmn. n c

UNITED s'rarns PATENT orrron.

LUDWIG SAHA, OF CHICAGO, ILLINOIS.

LEVEL.

Application filed .Tanualy 26, 1917.

I '0 all whom it may concern.-

Be it known that I, Luowlg Sana, a citizen. of the United States, residing at Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Levels.

This invention relates generally to levels but more particularly to that class termed, gravity or pendulum levels.

I The invention embodies certain novel features in a weighted pointer for indicating the degree of inclination from a horizontal or vertical line.

Another object resides in the provision of an antifriction supportfor the pendulum or indicator arbor.

A still further object is to produce a device of this character that shall be accurate, simple in construction and readily secured to the surface of a leveling stock.

With these and other objects in view my invention consists in the novel construction, combination, and relative position of the parts and members shown in the accompanying drawings, hereinafter described, and particularly pointed out in. the appended claims.

Referring to the drawing in which like reference characters indicate like parts or corresponding parts:

Figure 1 illustrates an elevation of my invention and Fig. 2 is a view of Fig. 1 taken at line 2-2 showing the 90 marks 29, Figs. 3 and 4 illustrate sections taken respectively on lines 33 and H of Fig. 1 showing the construction of the top, bottom, and side members. Fig. 5 is an end elevation taken on line 5--5 of Fig. 1. Fig. 6 illustrates a cross section taken on line 66 of Fig. 1 and Fig. 7 is an enlarged detail of the anti-friction support for the arbor.

Referring to the drawings which show one embodiment of my invention, I provide a. base-plate 10 having two opposite projections with holes 11 and 12 for securing screws, or the like, for attaching same to the level stock 13 of any suitable form and length.

The circular side 14: is made of light plate metal with a portion thereof open substantially for 270 of the circumference thereof, so as to form an opening for the transparent material 15, either of celluloid, glass or the like, which is securely retained between the bent edges 14 and 14 Specification of Letters Patent.

Patented Dec. 17, 1918.

Serial No. 144,661.

The face or top 16 is likewise of trans parent material and is securely held between the two members 17 and 18. The member 18 comprises a flat metal ring 1S" with three equally spaced arms 18 extending radially from the central flat portion 18" to the circular ring 18 The arms 18 may be formed with the ribs 13 as shown. In alinement with the arms 18 and integral with the ring l8 are downwardly extending legs 18 formed with the horizontally extending feet 18 screw-connected to the base-plate 10. The member 17 which supports the peripheral edge of the transparent top 16, is made of a flat ring portion 17 with equally spaced radial flat arms 1'? likewise extending to the flat central portion 17 but without the ribs or legs of the to member 18. The edge between the flat ring 17 and circular side 1% is soldered to bind and retain the two members together.

Now referring particularly to Figs. 6 and 7, the arbor or shaft 19 which has conical or pointed ends 19 is retained between the screws 20 and 21 and with the pointed ends thereof with point contact within the cupends and 21 respectively. The shaft is further retained by a pair of sleeves 22 which are partly threaded at one end 22 for screw-mounting upon the ends of the supporting screws 20 and 21 and the other ends of which are formed with the knife-edge annular bearing 22 for supporting the arbor 19.

A threaded washer 23 supports the underside of the flat portion 17 and a similar washer 23 securely retains the central portion of the dial 24:, which dial has imprinted or impressed thereon, suitably arranged graduations for indicating the degrees of angular inclination from the vertical or horizontal.

The indicator which is rigidly sup ported on the arbor 19 is normally maintained in vertical position by means of the weight 26 at one end thereof. The weighted end of the arbor is also provided with wing 27 of celluloid or other light material, which wing 27 fits closely to the walls of the chamber 28 and greatly aids to retard the vibrating weighted end into stationary position to indicate the degrees of inclination as the inwardly bent portion 25 registers with graduated dial The end 25 of the indicator is bent horizontally or perpendicularly to the portion 25 for the purpose of registering with any of the three 90 marks 29 on the transparent side 14:, to aid in reading rightangular positions. Likewise indicators similar to the diamond-like character 30 may be placed upon the base-plate 10 which register with said marks 29.

I claim: I

1. In a device of the kind described, the combination with a casing having a transparent face and circular side wall with a larger portion thereof transparent, of a stationary graduated dial within said casing, a pivotally mounted arbor, graduations on said transparent portion of said side wall, an indicator rigid with said arbor and arranged to register with said graduations on said stationary dial and a bent portion oi said indicator arranged to register with the graduations on said side wall.

2. In a device of the kind described, the combination with a casing having a transparent face and circular side wall with the larger portion thereof transparent, of a stationary graduated dial within said casing, a pivotally mounted arbor, graduations on said transparent portion of said side wall, an indicator rigid with said arbor and ar ranged to register with said graduations on said stationary dial, and a bent portion of said indicator arranged to register with the graduations on said side wall, and a wing on said indicator arranged to retard the vibration of said indicator,

3. Ina deviceof the kind described, and in combination, a casing comprising a baseplate; a cirular side wall; and a top embodying a flat transparent disk, a supporting member forsaid disk comprising a flat ring having integral equally spaced arms extending radially from a small fiat central portion, and a top member alike in structure with said supporting member and having legs integral with said ring ext-ending downwardly over said side wall. and having rigid connection with said base-plate. In a device of the kind described, the

combination with an indicator arbor having conical ends, of an anti-friction support for said arbor comprising a pair of screws having depressions within their ends arranged to receive said conical nds, and a sleeve member but having legs integral with said ring in alinement with said arms and extending over said side wall and having rigid connection with said base-plate; a graduated dial; a pivotally mounted arbor having conical ends; a weighted indicator rigidly mounted upon said arbor and arranged to register with said graduations on said dial, and a bent portion of said indicator arranged to register-with graduations on said side wall; a wing on said indicator arranged to retard the vibration thereof; and anantifriction support for said arbor tomprising a pair of screws carried by said top and base-plate and having depressions within their ends for receiving the conical ends of said arbor, and sleeves having a knife edge and being mounted on said screws for supporting said arbor.

In witness whereof, I have hereunto sub scribed my name this 19th day of January,

LUDWIG SAH A.

Copies of this patent may be obtained for five cents each. by addressing the Commissioner of Patents,

Washington, D. G. I V 

